Fitting for electric conduits.



W. 0. ROBINSON. FITTING FOR ELECTRIC GONDUITS.

APPLIOATION FILED MAY 29, 1909.

Patented Sept. 27, 1910.

Fina Lsmm Q; Rot. L (Ei ht t WITNESSES INVENTOR a wiw a r r. .3 PM H @ih ld llfihlt FITTING FOR ELECTRIC CONDUITS.

Specification of Letters Patent.

fspplieation filed May 29, 1909.

Patented Sept. 27, 191% Serial No. 499,225.-

To (all whom it may concern:

Be it known that l, "ti ILL'IAit C. ROBIN- soiv, residing at Pittsburg, in the county of Allegheny and State ol Pennsylvania, a citizen of the United States, have invented or discovered certain new and useful Iniprovements in Fittings for Electric Conduits, of which improvements the following is a specification.

The invention described. herein relates to certain improvements in means for connecting lamps, switches, branch lines, etc., to circuits having the conductors arranged within metallic conduits.

The invention is hereinafter more fully described and claimed.

In the accompanying drawings illustrating an einbodiinei'it of the said invention, Figure 1 is a view in elevation of a conduit and a cap piccc in position thereon at the point of connection; Fig. 2 is a view in crr ss-section on the line HII of Fig. 1, looking in the direction of the arrow a; Fig. 3 is a sectional elevation on the line HI IH of Fig. 2; Fig. i is a view in cross-section on the line lV-lV of Fig. Lt; Fig. 5 is a plan view of the connection, with the cap piece rei'noved; l ig. (5 is a view similar to Fig. 1 showing a connectioi'i at the dead end of a conduit; Fig. 7 is an underside plan view of the block 3, shmving means tor scouring it. in the conduit; Fi 8 is a cross sectional view sl'iowing sid block in position in the conduit.

The form of conduit shown herein is a molding of elliptical iorin, made up of a base orbody strip 2, and a cover strip 1 which. is snapped upon the body strip; out the invention is adapted 'to be used with the common tubular conduit or any other of suitable form. in the Inactice of the invention as, herein illustrated, the cover 1 is cut away for a short distance on each side of the point of coni'iection of the branch line, which may lead to a. lamp or any other translating device. A block 3, preferably o'l' insulating n'ia-tcrial, hereinafter termed the connecting l')lOCl\', is placed within the opened portion of the conduit intermediateo'ltheconductors t. While not necessary it is pretcrrcd that seats 5 should he formed in the block tor the reception of the conductors 4. Biol also preferred that said s ats shot formed on omiositc sides cl :1? pro ecting ridge 6 on the lil conductors l'hearing on these seats will assist in holding the block 3 in position in the conduit. While not necessary a spring 7 may be so secured to the block that when U- latter is placed in position the spring wi.=. bear against one or' the side walls of the conduit under the curled over edge a of the same, as clearly shown in Figs. 7 and 8.

The block 3 is provided on opposite sides of the ridge 6 with metal terminals b, 8*, of any suitable construction, whereby the tcrminals may be electrically connected to the conductors t at points from which the insulation is removed for that purpose. in the construction shown the means for connccting the terminals to the conductors consist. oi? screws 9. The bared portions of the conductors are placed under the heads of the screws, which when screwed into the terminal plates will clamp the conductors a ainst, the plates. The ctmd uztors ot the branch line are connected to the termnnils by any suitable means. in the construction shown, where the branch line is formed by an incandescent lamp socket, one of the terminals as S is formed with forks or prongs at one end which are bent over to hear on top of the ridge 0, as shown in l igs. 3, at, 5 and t), and are held by screws .lt) or other suitable means in electrical engagement with lugs ll on the lamp socket 12. The other terminal 8 is constructed and arranged to contact with the inner lamp terminal.

After the connecting block has been placed in position, and the electrical connections formed, the cap 13 is placed in position. This cup is preferably metallic, provided with an opening for the branch line, herein shown as circular to inclosc the lamp-socket 12, and having opposite end portions of such form and dimensions that they may be snapped upon and grip the conduit, preterably overlapping and bringing the cutaway ends of the cover section 1. The cap being metallic, the electrical continuity of the conduit is 'neserved, but at and adjacent; to the point of connection of the main and branch lines the cap should he lined with insulating material, as shown in Figs. 3 and 4t. Vhcr-e the branch circuit is connected to the main eonducto at. the end of the conduit, one of the gripping portions 7) of the cap is proith a. wall 0 adapted to close the con:

t, as shown in Fig.

I claim herein as my invention:

1. As a means for connecting brunch lines to conductors inclosed in conduits, the combination of a block placed Within a conduit, terminals for the conductors carried by the block but insulated from each other, and e cap provided with 1n opening for the reception of the branch conductors and having means for clamping the conduit inclosing the main conductors.

2. As a means for connecting branch lines to conductors inclosed invcondnits, the com bination of a block placed Within a conduit, terminals for the conductors carried by the block but insulated from each other, and means carried by the block for securing the block within the conduit.

3. As a means for connecting conductors inclosed in conduits, the combination of 2V block placed Within a conduit, a lamp-socket carried by the block, 41 terminal connecting the socket to one of the conductors, a second terminal for the other conductor in josition to contact with the inner terminal of the lamp, said terminals being insulated from each other, and a cup lamps to A metallic cup for inclosing the juncion of branch conductors with conductors inclosed in a conduit, provided with resilient gripping portions to clamp the conduiton opposite sides of the junction point, an opening in the cup for the branch conductors, and 21 lining of insulating material fitted Within the cap as and edjacent to the junction point.

5. A cup for inclosing the junction of branch conductors with conductors inclosed in a conduit, consisting of a tubular portion and with resilient gripping portions 0n 0pposite sides of the tubular portion to clamp the cap in position on the conduit.

In testimony whereof, I have hereunto set my hand.

WILLIAM C. ROBINSON. lVitnesscs FRIEDA E. vVoLrr, CHARLES BARNETT. 

